8428716 has 18 divisors (see below), whose sum is σ = 21306012. Its totient is φ = 2809560.

The previous prime is 8428709. The next prime is 8428729. The reversal of 8428716 is 6178248.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 234131 = 8428716 / (8 + 4 + 2 + 8 + 7 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117030 + ... + 117101.

Almost surely, 2^8428716 is an apocalyptic number.

It is an amenable number.

8428716 is an abundant number, since it is smaller than the sum of its proper divisors (12877296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8428716 is a wasteful number, since it uses less digits than its factorization.

8428716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234141 (or 234136 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 8428716 is about 2903.2251032257. The cubic root of 8428716 is about 203.5106494718.

The spelling of 8428716 in words is "eight million, four hundred twenty-eight thousand, seven hundred sixteen".